D3 Examples - Visualization of France's spreading of sickness

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    div.tooltip {
        color: #222;
        background-color: #fff;
        padding: .5em;
        text-shadow: #f5f5f5 0 1px 0;
        border-radius: 2px;
        opacity: 0.9;
        position: absolute;
    }
  </style>
</head>
​
<body>
  <script>
        var width = 700,
          height = 560;
    
        var svg = d3.select( "body" )
        .append( "svg" )
          .attr( "width", width )
          .attr( "height", height );
    
    var g = svg.append("g");
​
    var projection = d3.geo.conicConformal()
                .translate([width/1.6, height/2])
                .center([2.454071, 46.279229]).scale(3000);
​
    var path = d3.geo.path()
                 .projection(projection);
    
    var tooltip = d3.select('body').append('div')
                            .attr('class', 'hidden tooltip');
    
    var color = d3.scale.quantize()  
    .range(["rgb(237,248,233)", 
            "rgb(186,228,179)",
            "rgb(116,196,118)", 
            "rgb(49,163,84)", 
            "rgb(0,109,44)"]);
    
    /*
        d3.json("regions.geojson", function(json) {
        svg.selectAll("path")
           .data(json.features)
           .enter()
           .append("path")
           .attr("d", path)
             .style("fill", "rgb(200,200,200)");
​
        });*/
    
    d3.csv("GrippeFrance2014.csv", function(data) {
      /*    
      color.domain([
            d3.min(data, function(d) { return d.somme2014; }), 
            d3.max(data, function(d) { return d.somme2014; })
      ]);*/
      
      // color.domain([0,2000]);
      color.domain([0,300]);
      
      d3.json("regions.geojson", function(json) {
        for(var i = 0; i < data.length; i++) {
          var dataRegion = data[i].region;
          
          var dataValue = parseFloat(data[i].somme2014);
          
          var dataNovember = parseFloat(data[i]["02/11/14"]) +
                parseFloat(data[i]["09/11/14"]) +
              parseFloat(data[i]["16/11/14"]) +
              parseFloat(data[i]["23/11/14"]) +
              parseFloat(data[i]["30/11/14"]);
                    
          for(var j =0; j< json.features.length; j++) {
            var jsonRegion = json.features[j].properties.nom;
            
            if (dataRegion == jsonRegion) {
              json.features[j].properties.value = dataValue;
              json.features[j].properties.dataNovember = dataNovember;
                            
              break;
            }
          }          
        }
        g.selectAll("path")
        .data(json.features)
        .enter()
        .append("path")
        .attr("d", path)
        .style("fill", function(d) {
            var value = d.properties.dataNovember;
            // var value = d.properties.value;
            if (value) {
              return color(value);
            }
            else {
              return "#ccc";
              
              
            }
        })
        .on('mousemove', function(d) {
                    var mouse = d3.mouse(svg.node()).map(function(d) {
                        return parseInt(d);
                    });
                    tooltip.classed('hidden', false)
                        .attr('style', 'left:' + (mouse[0] + 15) +
                                'px; top:' + (mouse[1] - 35) + 'px')
                        .html(d.properties.nom + " : " + d.properties.dataNovember);
         })
          .on('mouseout', function() {
          tooltip.classed('hidden', true);
        });
      });
      
      
      
    });
  </script>
</body>
​
    